Trapiang Tma is located in Phnom Srok districk, about 56kilometers east of the provincial town. It is a natural site similar to Kangva Basin, but larger. There are fewer activities for tourists, however, because Trapaing Tma is farther from the provincial town.

Trapiang Tma is rich in gray cranes, an endangered species. Gray cranes migrate to Rattanakiri annually to lay their eggs. When their offspring are big enough, the cranes return to Trapiang Tmar, because there is more food here.